The “Painting for Peace” banner was inspired by a viral photo of Richard holding an art project with the message: “No more hurting people. Peace.” The banner now hangs above Interstate 93 in Boston thanks to the help of nearly 50 volunteers.

Richard was the youngest of three fatalities and his younger sister Jane, 7, was among the 260 injured in the attack. Richard’s sister lost a leg due to the attack and his mother was also seriously injured.